Fixing some issues with dropbox download + moving hard coded app dir to config
Adding new XLSInterview format
Factoring some file system functions into separate library
Fixing bug in file system functions.
Fixing a bug saving to file system due to FS API differences
fixing another file system bug
Adding discard confirmation and adding formatted duration to session list
Fixing player bug
Merge pull request #3 from nathanathan/master

Merge